Sonance R10SUB Reference 10" Passive In-Wall Subwoofer (Each) Paintable White 93354 - Best Buy
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Black BK-IWSDUAL8, 300W Trim-Less In-Wall Subwoofer with Dual 8" Graphite Cone Woofers | OSD Audio
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TRUNAMI-SUB
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JL Audio Fathom IWSv2-SYS-213 In-Wall Subwoofer System - The Absolute Sound